/*do while循环   至少执行一次循环体*/
var num = 3
do {
    console.log(num)
    num--;
} while (num > 1)


//计算 1+2+3....+100
var total = 0
var num2 = 1
do {
    total = total + num2;
    num2++;
} while (num2 < 101)

console.log(total)


/*continue 关键词  */
for (var i = 0; i < 7; i++) {
    if (i == 3) {
        continue;   //直接结束本次循环  进入下一次循环
    }
    console.log(i);
}


/*求 1~100 之间 能被7整除之外的数的和*/
var sum = 0;
for (var i = 0; i < +100; i++) {
    if (i % 7 == 0) {
        continue
    }
    sum += i;
}
console.log(sum)


/*break  结束整个循环*/

for (var i = 0; i < 7; i++) {
    if (i == 4) {
        break;   //直接结束整个循环
    }
    console.log(i)
}